drm/xe/throttle: Skip reason prefix while emitting array

The newly introduced "reasons" attribute already signifies possible
reasons for throttling and makes the prefix in individual attribute
names redundant while emitting them as an array. Skip the prefix.

Fixes: 83ccde67a3f7 ("drm/xe/gt_throttle: Avoid TOCTOU when monitoring reasons")
Signed-off-by: Raag Jadav <[e-mail]>
Reviewed-by: Sk Anirban <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Rodrigo Vivi <[e-mail]>
(cherry picked from commit b64a14334ef3ebbcf70d11bc67d0934bdc0e390d)
Signed-off-by: Thomas Hellström <[e-mail]>

drivers/gpu/drm/xe/xe_gt_throttle.c

···
 		struct throttle_attribute *other_ta = kobj_attribute_to_throttle(kattr);
 
 		if (other_ta->mask != U32_MAX && reasons & other_ta->mask)
-			ret += sysfs_emit_at(buff, ret, "%s ", (*pother)->name);
+			ret += sysfs_emit_at(buff, ret, "%s ", (*pother)->name + strlen("reason_"));
 	}
 
 	if (drm_WARN_ONCE(&xe->drm, !ret, "Unknown reason: %#x\n", reasons))